java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_partition_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:47:02,868 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:47:02,871 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:47:02,889 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:47:02,889 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:47:02,891 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:47:02,893 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:47:02,903 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:47:02,907 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:47:02,910 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:47:02,912 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:47:02,913 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:47:02,914 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:47:02,915 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:47:02,918 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:47:02,919 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:47:02,921 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:47:02,921 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:47:02,923 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:47:02,927 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:47:02,932 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:47:02,934 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:47:02,938 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:47:02,939 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:47:02,941 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 17:47:02,945 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:47:02,947 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:47:02,948 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:47:02,949 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:47:02,950 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:47:02,950 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:47:02,952 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:47:02,952 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:47:02,952 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:47:02,953 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:47:02,954 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:47:02,955 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 17:47:02,981 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:47:02,982 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:47:02,983 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:47:02,983 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:47:02,983 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:47:02,983 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:47:02,984 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:47:02,984 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:47:02,984 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:47:02,984 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:47:02,984 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:47:02,984 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:47:02,985 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:47:02,985 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:47:02,985 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:47:02,985 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:47:02,985 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:47:02,986 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:47:02,986 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:47:02,986 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:47:02,986 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:47:02,986 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:47:02,987 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:47:02,987 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:47:02,987 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:47:02,987 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:47:02,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:47:02,988 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:47:02,988 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:47:03,254 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:47:03,273 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:47:03,277 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:47:03,279 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:47:03,279 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:47:03,280 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_partition_ground-2.i [2019-10-13 17:47:03,364 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2048bc33/a8a6d4ac7ed543d0aa340723585c2600/FLAG295080581 [2019-10-13 17:47:03,770 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:47:03,771 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_partition_ground-2.i [2019-10-13 17:47:03,777 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2048bc33/a8a6d4ac7ed543d0aa340723585c2600/FLAG295080581 [2019-10-13 17:47:04,132 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2048bc33/a8a6d4ac7ed543d0aa340723585c2600 [2019-10-13 17:47:04,140 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:47:04,142 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:47:04,143 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:47:04,143 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:47:04,146 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:47:04,147 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:47:04" (1/1) ... [2019-10-13 17:47:04,150 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c0cb938 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:47:04, skipping insertion in model container [2019-10-13 17:47:04,150 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:47:04" (1/1) ... [2019-10-13 17:47:04,157 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:47:04,174 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:47:04,340 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:47:04,344 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:47:04,370 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:47:04,385 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:47:04,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:47:04 WrapperNode [2019-10-13 17:47:04,386 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:47:04,387 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:47:04,387 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:47:04,387 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:47:04,472 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:47:04" (1/1) ... [2019-10-13 17:47:04,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:47:04" (1/1) ... [2019-10-13 17:47:04,481 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:47:04" (1/1) ... [2019-10-13 17:47:04,482 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:47:04" (1/1) ... [2019-10-13 17:47:04,489 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:47:04" (1/1) ... [2019-10-13 17:47:04,495 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:47:04" (1/1) ... [2019-10-13 17:47:04,497 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:47:04" (1/1) ... [2019-10-13 17:47:04,499 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:47:04,500 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:47:04,500 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:47:04,500 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:47:04,501 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:47:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:47:04,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:47:04,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:47:04,549 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 17:47:04,550 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:47:04,550 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:47:04,550 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 17:47:04,550 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 17:47:04,550 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:47:04,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 17:47:04,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 17:47:04,551 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 17:47:04,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 17:47:04,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:47:04,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:47:04,962 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:47:04,962 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-13 17:47:04,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:47:04 BoogieIcfgContainer [2019-10-13 17:47:04,964 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:47:04,965 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:47:04,965 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:47:04,969 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:47:04,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:47:04" (1/3) ... [2019-10-13 17:47:04,970 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ea6c37c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:47:04, skipping insertion in model container [2019-10-13 17:47:04,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:47:04" (2/3) ... [2019-10-13 17:47:04,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ea6c37c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:47:04, skipping insertion in model container [2019-10-13 17:47:04,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:47:04" (3/3) ... [2019-10-13 17:47:04,973 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_partition_ground-2.i [2019-10-13 17:47:04,990 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:47:05,003 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:47:05,016 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:47:05,053 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:47:05,053 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:47:05,054 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:47:05,054 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:47:05,054 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:47:05,054 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:47:05,054 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:47:05,054 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:47:05,082 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2019-10-13 17:47:05,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-13 17:47:05,097 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:05,098 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:05,102 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:05,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:05,110 INFO L82 PathProgramCache]: Analyzing trace with hash -640162803, now seen corresponding path program 1 times [2019-10-13 17:47:05,119 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:05,120 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573322851] [2019-10-13 17:47:05,120 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:05,121 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:05,121 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:05,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:05,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:05,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:47:05,348 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573322851] [2019-10-13 17:47:05,349 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:47:05,350 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 17:47:05,350 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491147143] [2019-10-13 17:47:05,354 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:47:05,354 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:05,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:47:05,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:47:05,373 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2019-10-13 17:47:05,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:05,480 INFO L93 Difference]: Finished difference Result 54 states and 73 transitions. [2019-10-13 17:47:05,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:47:05,482 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-10-13 17:47:05,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:05,491 INFO L225 Difference]: With dead ends: 54 [2019-10-13 17:47:05,491 INFO L226 Difference]: Without dead ends: 26 [2019-10-13 17:47:05,495 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:47:05,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-13 17:47:05,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-13 17:47:05,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-13 17:47:05,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2019-10-13 17:47:05,538 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 16 [2019-10-13 17:47:05,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:05,538 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2019-10-13 17:47:05,539 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:47:05,539 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2019-10-13 17:47:05,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-13 17:47:05,540 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:05,540 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:05,541 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:05,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:05,542 INFO L82 PathProgramCache]: Analyzing trace with hash 2068442237, now seen corresponding path program 1 times [2019-10-13 17:47:05,542 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:05,542 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490427564] [2019-10-13 17:47:05,542 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:05,543 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:05,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:05,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:05,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:05,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:47:05,637 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490427564] [2019-10-13 17:47:05,637 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:47:05,638 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:47:05,638 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915722777] [2019-10-13 17:47:05,640 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:47:05,640 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:05,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:47:05,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:47:05,644 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 4 states. [2019-10-13 17:47:05,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:05,745 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2019-10-13 17:47:05,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:47:05,746 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-10-13 17:47:05,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:05,747 INFO L225 Difference]: With dead ends: 46 [2019-10-13 17:47:05,747 INFO L226 Difference]: Without dead ends: 28 [2019-10-13 17:47:05,749 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:47:05,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-13 17:47:05,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-10-13 17:47:05,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-13 17:47:05,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2019-10-13 17:47:05,757 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 16 [2019-10-13 17:47:05,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:05,757 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2019-10-13 17:47:05,757 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:47:05,757 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2019-10-13 17:47:05,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-13 17:47:05,760 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:05,760 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:05,761 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:05,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:05,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1850093537, now seen corresponding path program 1 times [2019-10-13 17:47:05,762 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:05,762 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602647202] [2019-10-13 17:47:05,762 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:05,762 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:05,763 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:05,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:05,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:05,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:47:05,919 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602647202] [2019-10-13 17:47:05,919 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:47:05,919 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:47:05,920 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314647713] [2019-10-13 17:47:05,920 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:47:05,920 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:05,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:47:05,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:47:05,921 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 4 states. [2019-10-13 17:47:06,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:06,016 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2019-10-13 17:47:06,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:47:06,017 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-10-13 17:47:06,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:06,018 INFO L225 Difference]: With dead ends: 48 [2019-10-13 17:47:06,018 INFO L226 Difference]: Without dead ends: 33 [2019-10-13 17:47:06,019 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:47:06,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-13 17:47:06,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2019-10-13 17:47:06,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-13 17:47:06,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2019-10-13 17:47:06,026 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 18 [2019-10-13 17:47:06,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:06,027 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2019-10-13 17:47:06,027 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:47:06,027 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2019-10-13 17:47:06,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-13 17:47:06,028 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:06,028 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:06,029 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:06,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:06,029 INFO L82 PathProgramCache]: Analyzing trace with hash -45207547, now seen corresponding path program 1 times [2019-10-13 17:47:06,030 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:06,030 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758497376] [2019-10-13 17:47:06,030 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:06,030 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:06,031 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:06,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:06,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:06,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 17:47:06,137 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758497376] [2019-10-13 17:47:06,138 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287900749] [2019-10-13 17:47:06,138 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:06,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:06,220 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 17:47:06,228 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:06,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 17:47:06,299 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:06,300 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-10-13 17:47:06,300 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974764941] [2019-10-13 17:47:06,301 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 17:47:06,301 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:06,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 17:47:06,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:47:06,302 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 7 states. [2019-10-13 17:47:06,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:06,429 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2019-10-13 17:47:06,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 17:47:06,430 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2019-10-13 17:47:06,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:06,431 INFO L225 Difference]: With dead ends: 62 [2019-10-13 17:47:06,431 INFO L226 Difference]: Without dead ends: 42 [2019-10-13 17:47:06,432 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:47:06,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-13 17:47:06,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2019-10-13 17:47:06,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-13 17:47:06,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2019-10-13 17:47:06,439 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 24 [2019-10-13 17:47:06,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:06,440 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2019-10-13 17:47:06,440 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 17:47:06,440 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2019-10-13 17:47:06,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-13 17:47:06,441 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:06,442 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:06,647 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:06,647 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:06,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:06,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1499586431, now seen corresponding path program 2 times [2019-10-13 17:47:06,648 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:06,648 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730337876] [2019-10-13 17:47:06,648 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:06,648 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:06,649 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:06,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:06,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:06,733 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 17:47:06,734 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730337876] [2019-10-13 17:47:06,734 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142555619] [2019-10-13 17:47:06,734 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:06,789 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:47:06,789 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:06,790 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:47:06,792 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:06,806 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 17:47:06,806 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:06,807 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-13 17:47:06,807 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211273416] [2019-10-13 17:47:06,807 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 17:47:06,808 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:06,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 17:47:06,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:47:06,808 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand 7 states. [2019-10-13 17:47:06,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:06,882 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2019-10-13 17:47:06,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 17:47:06,882 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2019-10-13 17:47:06,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:06,883 INFO L225 Difference]: With dead ends: 66 [2019-10-13 17:47:06,883 INFO L226 Difference]: Without dead ends: 40 [2019-10-13 17:47:06,884 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:47:06,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-13 17:47:06,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2019-10-13 17:47:06,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-13 17:47:06,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2019-10-13 17:47:06,891 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 32 [2019-10-13 17:47:06,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:06,891 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2019-10-13 17:47:06,891 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 17:47:06,891 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2019-10-13 17:47:06,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-13 17:47:06,892 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:06,893 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:07,096 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:07,097 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:07,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:07,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1436123101, now seen corresponding path program 3 times [2019-10-13 17:47:07,098 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:07,099 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588457325] [2019-10-13 17:47:07,099 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:07,099 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:07,099 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:07,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:07,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:07,215 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 17:47:07,215 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588457325] [2019-10-13 17:47:07,215 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490205162] [2019-10-13 17:47:07,216 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:07,272 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-13 17:47:07,272 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:07,273 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:47:07,276 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:07,321 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 17:47:07,322 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:07,322 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2019-10-13 17:47:07,322 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677176855] [2019-10-13 17:47:07,323 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 17:47:07,323 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:07,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 17:47:07,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-13 17:47:07,324 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 10 states. [2019-10-13 17:47:07,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:07,523 INFO L93 Difference]: Finished difference Result 78 states and 98 transitions. [2019-10-13 17:47:07,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 17:47:07,524 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2019-10-13 17:47:07,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:07,525 INFO L225 Difference]: With dead ends: 78 [2019-10-13 17:47:07,525 INFO L226 Difference]: Without dead ends: 52 [2019-10-13 17:47:07,527 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:47:07,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-13 17:47:07,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2019-10-13 17:47:07,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-13 17:47:07,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2019-10-13 17:47:07,541 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 34 [2019-10-13 17:47:07,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:07,541 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2019-10-13 17:47:07,541 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 17:47:07,541 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2019-10-13 17:47:07,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-13 17:47:07,543 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:07,543 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:07,747 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:07,748 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:07,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:07,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1447438805, now seen corresponding path program 4 times [2019-10-13 17:47:07,749 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:07,751 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83728666] [2019-10-13 17:47:07,751 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:07,751 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:07,751 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:07,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:07,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:07,912 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-13 17:47:07,913 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83728666] [2019-10-13 17:47:07,913 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272350177] [2019-10-13 17:47:07,914 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:07,999 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:47:08,000 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:08,001 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 17:47:08,004 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:08,017 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-13 17:47:08,018 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:08,018 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-13 17:47:08,018 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805041724] [2019-10-13 17:47:08,019 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 17:47:08,019 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:08,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 17:47:08,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:47:08,020 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand 9 states. [2019-10-13 17:47:08,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:08,108 INFO L93 Difference]: Finished difference Result 82 states and 100 transitions. [2019-10-13 17:47:08,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 17:47:08,109 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2019-10-13 17:47:08,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:08,109 INFO L225 Difference]: With dead ends: 82 [2019-10-13 17:47:08,110 INFO L226 Difference]: Without dead ends: 50 [2019-10-13 17:47:08,111 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:47:08,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-13 17:47:08,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2019-10-13 17:47:08,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-13 17:47:08,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2019-10-13 17:47:08,120 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 42 [2019-10-13 17:47:08,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:08,122 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2019-10-13 17:47:08,122 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 17:47:08,122 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2019-10-13 17:47:08,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-13 17:47:08,124 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:08,124 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:08,327 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:08,328 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:08,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:08,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1433365683, now seen corresponding path program 5 times [2019-10-13 17:47:08,329 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:08,329 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550495771] [2019-10-13 17:47:08,330 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:08,330 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:08,330 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:08,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:08,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:08,461 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-13 17:47:08,461 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550495771] [2019-10-13 17:47:08,461 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599953638] [2019-10-13 17:47:08,461 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:08,557 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-13 17:47:08,557 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:08,559 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 17:47:08,561 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:08,631 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-13 17:47:08,632 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:08,632 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2019-10-13 17:47:08,632 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092733476] [2019-10-13 17:47:08,633 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 17:47:08,633 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:08,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 17:47:08,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:47:08,634 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand 13 states. [2019-10-13 17:47:08,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:08,869 INFO L93 Difference]: Finished difference Result 94 states and 118 transitions. [2019-10-13 17:47:08,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 17:47:08,873 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 44 [2019-10-13 17:47:08,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:08,874 INFO L225 Difference]: With dead ends: 94 [2019-10-13 17:47:08,874 INFO L226 Difference]: Without dead ends: 62 [2019-10-13 17:47:08,875 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2019-10-13 17:47:08,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-13 17:47:08,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2019-10-13 17:47:08,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-13 17:47:08,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2019-10-13 17:47:08,882 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 44 [2019-10-13 17:47:08,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:08,882 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2019-10-13 17:47:08,882 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 17:47:08,882 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2019-10-13 17:47:08,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-13 17:47:08,883 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:08,883 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:09,084 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:09,085 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:09,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:09,085 INFO L82 PathProgramCache]: Analyzing trace with hash 589786441, now seen corresponding path program 6 times [2019-10-13 17:47:09,085 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:09,085 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513748744] [2019-10-13 17:47:09,086 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:09,086 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:09,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:09,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:09,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:09,191 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-10-13 17:47:09,192 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513748744] [2019-10-13 17:47:09,192 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951606676] [2019-10-13 17:47:09,192 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:09,249 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-10-13 17:47:09,249 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:09,250 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-13 17:47:09,254 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:09,296 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-10-13 17:47:09,297 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:47:09,303 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:47:09,303 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:47:09,303 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:8, output treesize:4 [2019-10-13 17:47:09,360 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 26 [2019-10-13 17:47:09,361 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:47:09,378 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:47:09,379 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-10-13 17:47:09,379 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:42, output treesize:38 [2019-10-13 17:47:09,605 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:47:09,606 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 26 [2019-10-13 17:47:09,607 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:47:09,610 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-10-13 17:47:09,621 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:47:09,622 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:47:09,624 INFO L496 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:47:09,625 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:55, output treesize:14 [2019-10-13 17:47:09,655 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:47:09,716 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-13 17:47:09,717 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:09,717 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2019-10-13 17:47:09,717 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727737455] [2019-10-13 17:47:09,718 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-13 17:47:09,718 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:09,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-13 17:47:09,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2019-10-13 17:47:09,719 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand 18 states. [2019-10-13 17:47:12,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:12,781 INFO L93 Difference]: Finished difference Result 137 states and 170 transitions. [2019-10-13 17:47:12,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-13 17:47:12,782 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2019-10-13 17:47:12,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:12,785 INFO L225 Difference]: With dead ends: 137 [2019-10-13 17:47:12,785 INFO L226 Difference]: Without dead ends: 99 [2019-10-13 17:47:12,787 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=280, Invalid=1126, Unknown=0, NotChecked=0, Total=1406 [2019-10-13 17:47:12,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-10-13 17:47:12,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 75. [2019-10-13 17:47:12,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-10-13 17:47:12,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 92 transitions. [2019-10-13 17:47:12,801 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 92 transitions. Word has length 52 [2019-10-13 17:47:12,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:12,801 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 92 transitions. [2019-10-13 17:47:12,801 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-13 17:47:12,801 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 92 transitions. [2019-10-13 17:47:12,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-13 17:47:12,802 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:12,802 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:13,012 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:13,012 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:13,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:13,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1465812461, now seen corresponding path program 1 times [2019-10-13 17:47:13,013 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:13,014 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111005197] [2019-10-13 17:47:13,014 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:13,014 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:13,014 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:13,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:13,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:13,129 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-10-13 17:47:13,129 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111005197] [2019-10-13 17:47:13,130 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279017691] [2019-10-13 17:47:13,130 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:13,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:13,189 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 17:47:13,192 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:13,208 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-10-13 17:47:13,208 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:13,208 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-13 17:47:13,209 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508136881] [2019-10-13 17:47:13,209 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 17:47:13,209 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:13,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 17:47:13,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:47:13,210 INFO L87 Difference]: Start difference. First operand 75 states and 92 transitions. Second operand 12 states. [2019-10-13 17:47:13,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:13,321 INFO L93 Difference]: Finished difference Result 132 states and 166 transitions. [2019-10-13 17:47:13,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 17:47:13,322 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 54 [2019-10-13 17:47:13,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:13,323 INFO L225 Difference]: With dead ends: 132 [2019-10-13 17:47:13,323 INFO L226 Difference]: Without dead ends: 78 [2019-10-13 17:47:13,323 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:47:13,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-10-13 17:47:13,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2019-10-13 17:47:13,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-10-13 17:47:13,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 94 transitions. [2019-10-13 17:47:13,333 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 94 transitions. Word has length 54 [2019-10-13 17:47:13,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:13,334 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 94 transitions. [2019-10-13 17:47:13,334 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 17:47:13,334 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 94 transitions. [2019-10-13 17:47:13,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-13 17:47:13,335 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:13,335 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:13,546 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:13,547 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:13,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:13,547 INFO L82 PathProgramCache]: Analyzing trace with hash 812163087, now seen corresponding path program 2 times [2019-10-13 17:47:13,547 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:13,548 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58986990] [2019-10-13 17:47:13,548 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:13,548 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:13,548 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:13,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:13,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:13,673 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-10-13 17:47:13,673 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58986990] [2019-10-13 17:47:13,674 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578159969] [2019-10-13 17:47:13,674 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:13,727 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:47:13,727 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:13,728 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 17:47:13,732 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:13,754 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-10-13 17:47:13,754 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:13,754 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-13 17:47:13,755 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851962666] [2019-10-13 17:47:13,755 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 17:47:13,755 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:13,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 17:47:13,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:47:13,756 INFO L87 Difference]: Start difference. First operand 77 states and 94 transitions. Second operand 13 states. [2019-10-13 17:47:13,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:13,841 INFO L93 Difference]: Finished difference Result 134 states and 168 transitions. [2019-10-13 17:47:13,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 17:47:13,842 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2019-10-13 17:47:13,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:13,843 INFO L225 Difference]: With dead ends: 134 [2019-10-13 17:47:13,843 INFO L226 Difference]: Without dead ends: 80 [2019-10-13 17:47:13,844 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:47:13,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-10-13 17:47:13,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2019-10-13 17:47:13,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-10-13 17:47:13,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 96 transitions. [2019-10-13 17:47:13,855 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 96 transitions. Word has length 56 [2019-10-13 17:47:13,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:13,855 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 96 transitions. [2019-10-13 17:47:13,855 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 17:47:13,855 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 96 transitions. [2019-10-13 17:47:13,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-10-13 17:47:13,856 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:13,857 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:14,060 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:14,061 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:14,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:14,061 INFO L82 PathProgramCache]: Analyzing trace with hash -279660111, now seen corresponding path program 3 times [2019-10-13 17:47:14,061 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:14,062 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529855684] [2019-10-13 17:47:14,062 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:14,062 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:14,062 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:14,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:14,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:14,242 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-10-13 17:47:14,243 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529855684] [2019-10-13 17:47:14,243 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147919703] [2019-10-13 17:47:14,243 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:14,335 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-13 17:47:14,335 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:14,337 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-13 17:47:14,342 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:14,350 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-10-13 17:47:14,351 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:47:14,353 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:47:14,353 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:47:14,354 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:8, output treesize:4 [2019-10-13 17:47:14,408 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 26 [2019-10-13 17:47:14,408 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:47:14,418 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:47:14,420 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-13 17:47:14,421 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:35 [2019-10-13 17:47:14,585 INFO L341 Elim1Store]: treesize reduction 17, result has 73.8 percent of original size [2019-10-13 17:47:14,586 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 88 [2019-10-13 17:47:14,587 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:47:14,620 INFO L567 ElimStorePlain]: treesize reduction 32, result has 68.9 percent of original size [2019-10-13 17:47:14,621 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:47:14,626 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-10-13 17:47:14,626 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:71 [2019-10-13 17:47:14,627 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:47:14,666 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:47:16,853 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2019-10-13 17:47:16,970 INFO L341 Elim1Store]: treesize reduction 17, result has 66.7 percent of original size [2019-10-13 17:47:16,970 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 43 [2019-10-13 17:47:16,971 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:47:16,972 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:47:16,973 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:47:16,974 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2019-10-13 17:47:17,000 INFO L567 ElimStorePlain]: treesize reduction 30, result has 48.3 percent of original size [2019-10-13 17:47:17,000 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:47:17,001 INFO L496 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2019-10-13 17:47:17,002 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:53, output treesize:10 [2019-10-13 17:47:17,029 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 17:47:17,142 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-10-13 17:47:17,143 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:17,143 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2019-10-13 17:47:17,143 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185674348] [2019-10-13 17:47:17,144 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-13 17:47:17,144 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:17,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-13 17:47:17,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=545, Unknown=1, NotChecked=0, Total=650 [2019-10-13 17:47:17,145 INFO L87 Difference]: Start difference. First operand 79 states and 96 transitions. Second operand 26 states. [2019-10-13 17:47:24,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:24,456 INFO L93 Difference]: Finished difference Result 189 states and 238 transitions. [2019-10-13 17:47:24,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-10-13 17:47:24,456 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 58 [2019-10-13 17:47:24,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:24,458 INFO L225 Difference]: With dead ends: 189 [2019-10-13 17:47:24,459 INFO L226 Difference]: Without dead ends: 135 [2019-10-13 17:47:24,461 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=626, Invalid=3533, Unknown=1, NotChecked=0, Total=4160 [2019-10-13 17:47:24,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2019-10-13 17:47:24,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 100. [2019-10-13 17:47:24,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-10-13 17:47:24,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 124 transitions. [2019-10-13 17:47:24,473 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 124 transitions. Word has length 58 [2019-10-13 17:47:24,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:24,474 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 124 transitions. [2019-10-13 17:47:24,474 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-13 17:47:24,474 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 124 transitions. [2019-10-13 17:47:24,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-10-13 17:47:24,475 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:24,475 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:24,683 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:24,684 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:24,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:24,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1291567727, now seen corresponding path program 4 times [2019-10-13 17:47:24,684 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:24,685 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446788225] [2019-10-13 17:47:24,685 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:24,685 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:24,685 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:24,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:24,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:24,816 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-10-13 17:47:24,816 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446788225] [2019-10-13 17:47:24,817 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762481319] [2019-10-13 17:47:24,817 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:24,875 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:47:24,876 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:24,876 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-13 17:47:24,879 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:24,905 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-10-13 17:47:24,906 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:24,906 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-10-13 17:47:24,906 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100179317] [2019-10-13 17:47:24,906 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-13 17:47:24,907 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:24,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-13 17:47:24,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-13 17:47:24,907 INFO L87 Difference]: Start difference. First operand 100 states and 124 transitions. Second operand 15 states. [2019-10-13 17:47:25,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:25,043 INFO L93 Difference]: Finished difference Result 176 states and 224 transitions. [2019-10-13 17:47:25,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-13 17:47:25,044 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 60 [2019-10-13 17:47:25,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:25,045 INFO L225 Difference]: With dead ends: 176 [2019-10-13 17:47:25,046 INFO L226 Difference]: Without dead ends: 103 [2019-10-13 17:47:25,046 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-13 17:47:25,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-10-13 17:47:25,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2019-10-13 17:47:25,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-10-13 17:47:25,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 126 transitions. [2019-10-13 17:47:25,056 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 126 transitions. Word has length 60 [2019-10-13 17:47:25,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:25,056 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 126 transitions. [2019-10-13 17:47:25,056 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-13 17:47:25,057 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 126 transitions. [2019-10-13 17:47:25,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-10-13 17:47:25,057 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:25,058 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:25,262 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:25,263 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:25,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:25,263 INFO L82 PathProgramCache]: Analyzing trace with hash -2061060557, now seen corresponding path program 5 times [2019-10-13 17:47:25,263 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:25,264 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554440108] [2019-10-13 17:47:25,264 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:25,264 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:25,264 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:25,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:25,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:25,403 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-10-13 17:47:25,404 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554440108] [2019-10-13 17:47:25,404 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75213008] [2019-10-13 17:47:25,404 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:25,751 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-10-13 17:47:25,751 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:25,754 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 17:47:25,756 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:25,827 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2019-10-13 17:47:25,827 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:25,827 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 20 [2019-10-13 17:47:25,827 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468054878] [2019-10-13 17:47:25,828 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-13 17:47:25,828 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:25,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-13 17:47:25,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2019-10-13 17:47:25,829 INFO L87 Difference]: Start difference. First operand 102 states and 126 transitions. Second operand 20 states. [2019-10-13 17:47:26,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:26,204 INFO L93 Difference]: Finished difference Result 226 states and 293 transitions. [2019-10-13 17:47:26,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-13 17:47:26,204 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 62 [2019-10-13 17:47:26,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:26,206 INFO L225 Difference]: With dead ends: 226 [2019-10-13 17:47:26,207 INFO L226 Difference]: Without dead ends: 153 [2019-10-13 17:47:26,208 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=341, Invalid=651, Unknown=0, NotChecked=0, Total=992 [2019-10-13 17:47:26,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-10-13 17:47:26,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 116. [2019-10-13 17:47:26,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-10-13 17:47:26,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 144 transitions. [2019-10-13 17:47:26,219 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 144 transitions. Word has length 62 [2019-10-13 17:47:26,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:26,220 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 144 transitions. [2019-10-13 17:47:26,220 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-13 17:47:26,220 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 144 transitions. [2019-10-13 17:47:26,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-10-13 17:47:26,221 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:26,221 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:26,432 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:26,432 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:26,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:26,433 INFO L82 PathProgramCache]: Analyzing trace with hash 304329915, now seen corresponding path program 6 times [2019-10-13 17:47:26,433 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:26,433 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13029142] [2019-10-13 17:47:26,434 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:26,434 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:26,434 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:26,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:26,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:26,603 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-13 17:47:26,604 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13029142] [2019-10-13 17:47:26,604 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211603042] [2019-10-13 17:47:26,604 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:26,800 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-10-13 17:47:26,800 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:26,802 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 17:47:26,804 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:26,915 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2019-10-13 17:47:26,916 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:26,916 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8] total 22 [2019-10-13 17:47:26,916 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044868116] [2019-10-13 17:47:26,917 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-13 17:47:26,917 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:26,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-13 17:47:26,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=328, Unknown=0, NotChecked=0, Total=462 [2019-10-13 17:47:26,918 INFO L87 Difference]: Start difference. First operand 116 states and 144 transitions. Second operand 22 states. [2019-10-13 17:47:27,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:27,321 INFO L93 Difference]: Finished difference Result 252 states and 327 transitions. [2019-10-13 17:47:27,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-13 17:47:27,321 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 70 [2019-10-13 17:47:27,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:27,324 INFO L225 Difference]: With dead ends: 252 [2019-10-13 17:47:27,324 INFO L226 Difference]: Without dead ends: 167 [2019-10-13 17:47:27,325 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=407, Invalid=783, Unknown=0, NotChecked=0, Total=1190 [2019-10-13 17:47:27,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2019-10-13 17:47:27,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 130. [2019-10-13 17:47:27,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-10-13 17:47:27,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 162 transitions. [2019-10-13 17:47:27,335 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 162 transitions. Word has length 70 [2019-10-13 17:47:27,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:27,335 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 162 transitions. [2019-10-13 17:47:27,335 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-13 17:47:27,335 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 162 transitions. [2019-10-13 17:47:27,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-13 17:47:27,336 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:27,336 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 6, 6, 6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:27,539 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:27,540 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:27,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:27,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1426838071, now seen corresponding path program 7 times [2019-10-13 17:47:27,541 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:27,541 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721557249] [2019-10-13 17:47:27,542 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:27,542 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:27,542 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:27,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:27,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:27,745 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-10-13 17:47:27,745 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721557249] [2019-10-13 17:47:27,745 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632575662] [2019-10-13 17:47:27,745 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:27,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:27,859 INFO L256 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-13 17:47:27,861 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:27,876 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-10-13 17:47:27,877 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:27,877 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-10-13 17:47:27,877 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884471456] [2019-10-13 17:47:27,878 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-13 17:47:27,878 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:27,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-13 17:47:27,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-13 17:47:27,879 INFO L87 Difference]: Start difference. First operand 130 states and 162 transitions. Second operand 18 states. [2019-10-13 17:47:28,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:28,022 INFO L93 Difference]: Finished difference Result 230 states and 294 transitions. [2019-10-13 17:47:28,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-13 17:47:28,023 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 78 [2019-10-13 17:47:28,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:28,024 INFO L225 Difference]: With dead ends: 230 [2019-10-13 17:47:28,024 INFO L226 Difference]: Without dead ends: 133 [2019-10-13 17:47:28,025 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-13 17:47:28,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2019-10-13 17:47:28,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2019-10-13 17:47:28,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2019-10-13 17:47:28,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 164 transitions. [2019-10-13 17:47:28,034 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 164 transitions. Word has length 78 [2019-10-13 17:47:28,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:28,034 INFO L462 AbstractCegarLoop]: Abstraction has 132 states and 164 transitions. [2019-10-13 17:47:28,034 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-13 17:47:28,034 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 164 transitions. [2019-10-13 17:47:28,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-10-13 17:47:28,035 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:28,035 INFO L380 BasicCegarLoop]: trace histogram [14, 14, 6, 6, 6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:28,247 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:28,248 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:28,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:28,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1504565671, now seen corresponding path program 8 times [2019-10-13 17:47:28,248 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:28,248 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671614862] [2019-10-13 17:47:28,248 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:28,249 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:28,249 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:28,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:28,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:28,432 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-10-13 17:47:28,433 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671614862] [2019-10-13 17:47:28,433 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305707859] [2019-10-13 17:47:28,433 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:28,501 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:47:28,501 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:28,502 INFO L256 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-13 17:47:28,504 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:28,530 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-10-13 17:47:28,531 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:28,531 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-10-13 17:47:28,531 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188856409] [2019-10-13 17:47:28,532 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-13 17:47:28,532 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:28,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-13 17:47:28,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-13 17:47:28,532 INFO L87 Difference]: Start difference. First operand 132 states and 164 transitions. Second operand 19 states. [2019-10-13 17:47:28,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:28,635 INFO L93 Difference]: Finished difference Result 232 states and 296 transitions. [2019-10-13 17:47:28,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-13 17:47:28,635 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 80 [2019-10-13 17:47:28,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:28,636 INFO L225 Difference]: With dead ends: 232 [2019-10-13 17:47:28,636 INFO L226 Difference]: Without dead ends: 135 [2019-10-13 17:47:28,638 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-13 17:47:28,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2019-10-13 17:47:28,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2019-10-13 17:47:28,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-10-13 17:47:28,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 166 transitions. [2019-10-13 17:47:28,649 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 166 transitions. Word has length 80 [2019-10-13 17:47:28,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:28,651 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 166 transitions. [2019-10-13 17:47:28,651 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-13 17:47:28,651 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 166 transitions. [2019-10-13 17:47:28,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-10-13 17:47:28,652 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:28,652 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 6, 6, 6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:28,855 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:28,856 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:28,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:28,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1085015557, now seen corresponding path program 9 times [2019-10-13 17:47:28,856 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:28,856 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828253654] [2019-10-13 17:47:28,857 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:28,857 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:28,857 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:28,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:29,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:29,137 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-10-13 17:47:29,138 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828253654] [2019-10-13 17:47:29,138 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402727753] [2019-10-13 17:47:29,138 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:29,462 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-13 17:47:29,462 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:29,464 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-13 17:47:29,467 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:29,472 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-10-13 17:47:29,473 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:47:29,475 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:47:29,475 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:47:29,475 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:8, output treesize:4 [2019-10-13 17:47:29,516 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 26 [2019-10-13 17:47:29,516 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:47:29,524 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:47:29,524 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-13 17:47:29,524 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:35 [2019-10-13 17:47:29,619 INFO L341 Elim1Store]: treesize reduction 17, result has 73.8 percent of original size [2019-10-13 17:47:29,620 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 88 [2019-10-13 17:47:29,620 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:47:29,649 INFO L567 ElimStorePlain]: treesize reduction 32, result has 68.0 percent of original size [2019-10-13 17:47:29,650 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:47:29,651 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-10-13 17:47:29,651 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:68 [2019-10-13 17:47:29,651 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:47:29,695 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:47:29,880 INFO L341 Elim1Store]: treesize reduction 52, result has 48.0 percent of original size [2019-10-13 17:47:29,880 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 56 treesize of output 100 [2019-10-13 17:47:29,883 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:47:29,917 INFO L567 ElimStorePlain]: treesize reduction 32, result has 68.9 percent of original size [2019-10-13 17:47:29,918 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:47:29,919 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-10-13 17:47:29,919 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:63, output treesize:71 [2019-10-13 17:47:29,920 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:47:29,973 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:47:30,216 INFO L341 Elim1Store]: treesize reduction 17, result has 66.7 percent of original size [2019-10-13 17:47:30,217 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 43 [2019-10-13 17:47:30,218 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:47:30,218 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:47:30,219 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:47:30,220 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2019-10-13 17:47:30,244 INFO L567 ElimStorePlain]: treesize reduction 30, result has 48.3 percent of original size [2019-10-13 17:47:30,245 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:47:30,246 INFO L496 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2019-10-13 17:47:30,246 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:53, output treesize:10 [2019-10-13 17:47:30,270 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 17:47:30,434 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 23 proven. 55 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2019-10-13 17:47:30,435 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:30,435 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2019-10-13 17:47:30,435 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216259036] [2019-10-13 17:47:30,435 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-13 17:47:30,435 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:30,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-13 17:47:30,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=990, Unknown=0, NotChecked=0, Total=1190 [2019-10-13 17:47:30,436 INFO L87 Difference]: Start difference. First operand 134 states and 166 transitions. Second operand 35 states. [2019-10-13 17:47:35,243 WARN L191 SmtUtils]: Spent 2.70 s on a formula simplification. DAG size of input: 58 DAG size of output: 33 [2019-10-13 17:47:47,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:47,880 INFO L93 Difference]: Finished difference Result 341 states and 434 transitions. [2019-10-13 17:47:47,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2019-10-13 17:47:47,881 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 82 [2019-10-13 17:47:47,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:47,883 INFO L225 Difference]: With dead ends: 341 [2019-10-13 17:47:47,883 INFO L226 Difference]: Without dead ends: 244 [2019-10-13 17:47:47,887 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2778 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=1338, Invalid=9168, Unknown=0, NotChecked=0, Total=10506 [2019-10-13 17:47:47,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2019-10-13 17:47:47,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 164. [2019-10-13 17:47:47,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2019-10-13 17:47:47,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 206 transitions. [2019-10-13 17:47:47,914 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 206 transitions. Word has length 82 [2019-10-13 17:47:47,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:47,914 INFO L462 AbstractCegarLoop]: Abstraction has 164 states and 206 transitions. [2019-10-13 17:47:47,915 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-13 17:47:47,915 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 206 transitions. [2019-10-13 17:47:47,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-10-13 17:47:47,916 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:47,916 INFO L380 BasicCegarLoop]: trace histogram [16, 16, 6, 6, 6, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:48,120 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:48,121 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:48,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:48,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1390821791, now seen corresponding path program 10 times [2019-10-13 17:47:48,122 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:48,122 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000115057] [2019-10-13 17:47:48,122 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:48,122 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:48,123 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:48,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:48,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:48,325 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-10-13 17:47:48,326 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000115057] [2019-10-13 17:47:48,326 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049468507] [2019-10-13 17:47:48,326 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:48,413 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:47:48,413 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:48,414 INFO L256 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-13 17:47:48,416 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:48,432 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-10-13 17:47:48,433 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:48,433 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-10-13 17:47:48,433 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193597774] [2019-10-13 17:47:48,433 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-13 17:47:48,434 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:48,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-13 17:47:48,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-13 17:47:48,434 INFO L87 Difference]: Start difference. First operand 164 states and 206 transitions. Second operand 21 states. [2019-10-13 17:47:48,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:48,591 INFO L93 Difference]: Finished difference Result 292 states and 376 transitions. [2019-10-13 17:47:48,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-13 17:47:48,591 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 84 [2019-10-13 17:47:48,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:48,592 INFO L225 Difference]: With dead ends: 292 [2019-10-13 17:47:48,592 INFO L226 Difference]: Without dead ends: 167 [2019-10-13 17:47:48,593 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-13 17:47:48,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2019-10-13 17:47:48,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2019-10-13 17:47:48,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2019-10-13 17:47:48,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 208 transitions. [2019-10-13 17:47:48,605 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 208 transitions. Word has length 84 [2019-10-13 17:47:48,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:48,605 INFO L462 AbstractCegarLoop]: Abstraction has 166 states and 208 transitions. [2019-10-13 17:47:48,605 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-13 17:47:48,605 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 208 transitions. [2019-10-13 17:47:48,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-13 17:47:48,606 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:48,606 INFO L380 BasicCegarLoop]: trace histogram [17, 17, 6, 6, 6, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:48,807 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:48,807 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:48,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:48,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1447988159, now seen corresponding path program 11 times [2019-10-13 17:47:48,808 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:48,808 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483759112] [2019-10-13 17:47:48,809 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:48,809 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:48,809 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:48,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:49,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:49,023 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-10-13 17:47:49,024 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483759112] [2019-10-13 17:47:49,024 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800128269] [2019-10-13 17:47:49,024 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true